关键词: 水平T型管,    , 油水两相流,   , 中质稠油,    , VOF模型

Abstract: Aiming at the characteristics of the existence of many heavy oil fields and oilfields with high moisture content in our country, conducting numerical simulation with the use of VOF multiphase flow model on twophase oilwater flows in horizontal Ttube which are common on gathering pipeline network. Under given conditions, the moisture content in medium heavy oil was 80%, the flow rate was 1.5 m/s, the simulation results show that the twophase oilwater flow belongs to the pattern of oilinwater dispersed flow, the water plays the role of the basic phase and oil as the dispersed phase. The pressure in the trunk pipeline before branch reduces at the linear rate of 300 Pa/m, the pressure increases in the branch section, then decreases linearly with the flow, analyzed the mechanism of pipeline pressure drop in the branch pipeline. The results will play an important role in optimizing network structure, designing reasonable parameters of pipeline, controlling pipeline corrosion and protecting pipelines. 

Key words: Horizontal Ttube,    ,  Twophase flow of oilwater,     , Medium heavy oil,   ,  VOF model